Thank you very much Doitsu.That was quite good. I finally managed to read the file in Kindle previewer with Fire option. I did not get good result in the Kindle fire tablet. Therefore what I need may be one that is compatible with KF8 format.I have also imported to Calibre with incorrect display.
I have also unzipped with 7Zip and looked at the css and OEBF files. As you said I will have to "massage" the source file.